Lawyers have been questioning the United States’ openness to foreign investment in light of the harsh actions the Trump administration has taken against TikTok earlier this month, but more doubts were raised this week after TikTok filed its challenge to the government’s executive order prohibiting transactions with the company due to alleged national security risks.

TikTok’s complaint, filed in the U.S. District Court for the Central District of California by Covington & Burling global litigation chair John Hall, shed light on the way the Committee on Foreign Investment in the United States (CFIUS) handled its foreign investment review of the company’s entry into the U.S. market—a rare public look at a highly secretive process.